Refactor uses of 'eslint-disable no-param-reassign'

Description

There are currently 31 files that have eslint-disable no-param-reassign. Let's make it better!

The files

Generated by:

git grep -e 'disable.*no-param-reassign' -c

• app/assets/javascripts/autosave.js
• app/assets/javascripts/boards/models/list.js
• app/assets/javascripts/ci_variable_list/ajax_variable_list.js
• app/assets/javascripts/cycle_analytics/cycle_analytics_store.js
• app/assets/javascripts/filtered_search/filtered_search_visual_tokens.js
• app/assets/javascripts/fly_out_nav.js
• app/assets/javascripts/gl_dropdown.js
• app/assets/javascripts/label_manager.js
• app/assets/javascripts/labels_select.js
• app/assets/javascripts/lib/utils/common_utils.js
• app/assets/javascripts/lib/utils/text_markdown.js
• app/assets/javascripts/line_highlighter.js
• app/assets/javascripts/merge_conflicts/components/diff_file_editor.js
• app/assets/javascripts/merge_conflicts/components/inline_conflict_lines.js
• app/assets/javascripts/merge_conflicts/components/parallel_conflict_lines.js
• app/assets/javascripts/merge_conflicts/merge_conflict_store.js
• app/assets/javascripts/milestone_select.js
• app/assets/javascripts/pages/projects/graphs/show/stat_graph_contributors.js
• app/assets/javascripts/pages/projects/graphs/show/stat_graph_contributors_graph.js
• app/assets/javascripts/pages/projects/graphs/show/stat_graph_contributors_util.js
• app/assets/javascripts/right_sidebar.js
• app/assets/javascripts/users_select.js
• app/assets/javascripts/vue_merge_request_widget/components/states/ready_to_merge.vue
• app/assets/javascripts/vue_shared/vue_resource_interceptor.js
• ee/app/assets/javascripts/boards/components/sidebar/remove_issue.js
• ee/app/assets/javascripts/boards/models/list.js
• ee/app/assets/javascripts/projects/settings/access_dropdown.js
• spec/javascripts/gl_dropdown_spec.js
• spec/javascripts/helpers/vue_resource_helper.js
• spec/javascripts/search_autocomplete_spec.js
• spec/javascripts/u2f/mock_u2f_device.js